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All Journal Jurnal Ilmiah Universitas Batanghari Jambi ALCHEMY Jurnal Penelitian Kimia Eksakta : Berkala Ilmiah Bidang MIPA AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) Gunung Djati Conference Series Journal of Biobased Chemicals (JOBC) Science Get Journal
Silvia Devi Eka Putri
Akademi Kimia Analis Caraka Nusantara, Depok
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Facile Synthesis of Composite Chitosan and Durio zibethinus Seed and Its Applications as Adsorbent of Metal Ion Ni(II) Silvia Devi Eka Putri; Sri Mulijani; Komar Sutriah
ALCHEMY Jurnal Penelitian Kimia Vol 19, No 2 (2023): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.19.2.65948.197-209

Abstract

Nickel is one of the most dangerous heavy metals that impact water ecosystems and human health. In the study, natural and harmless composite materials such as biochar and chitosan were modified to build adsorbent composites and form optimal conditions for the adsorption of nickel heavy metal ions from contaminated wastewater. Biochar was prepared from Durio zibethinus seeds by hydrothermal method to form nanopowder. It was treated with acid, while chitosan was designed as nanopowder by hydrothermal method, also without acid treatment. Composite adsorbents were prepared by mixing biochar and chitosan with a ratio of 4:3 (w/w). Fourier Transform Infrared characterizes composite materials as adsorbents, biochar, and chitosan. The surface morphology of the adsorbent was evaluated by scanning electron microscopy. Furthermore, Langmuir, Freundlich, and Temkin isotherms determine the adsorbent's performance. In addition, batch adsorption experiments were carried out to measure the effect of solution pH, adsorbent dosage, and initial concentration of metal ions. Nickel ion adsorption by the composite adsorbent showed an adsorption capacity of 26.69 mg/g, a maximum removal efficiency of 89.39% at optimum conditions of pH 6, an adsorbent dose of 0.5 g, and a contact time of 200 minutes. This adsorption capacity was better than chitosan and durian seed adsorbents. The nickel ion adsorption process by composite adsorbent shows a pattern in the Temkin isotherm model. In contrast, the chitosan and Durio zibethinus seed adsorbents tended to follow the Langmuir and Freundlich isotherm models. In addition, the adsorption kinetics of the composite material showed pseudo-second-order kinetics, and the reaction was exothermic.
Engineering of Superhydrophobic Materials: Applications and Prospects in Oil-Water Separation Technology Silvia Devi Eka Putri; Eka Cahya Muliawati
Science Journal Get Press Vol 2 No 3 (2025): July, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/science.v2i3.165

Abstract

The rapid growth of industries like petrochemical processing, offshore drilling, transportation, and metallurgy has increased oily wastewater and oil spills, threatening ecosystems and human health. Traditional oil-water separation methods often struggle with low efficiency and poor stability, especially against stable emulsions. This study investigates superhydrophobic materials fabricated via dip-coating on stainless steel mesh, electrospinning of PVDF membranes, and chemical etching of aluminum surfaces. All materials showed excellent water repellency with contact angles over 150°, achieving oil-water separation efficiencies above 97% for various oils. The dip-coated mesh achieved the highest flux and separation efficiency, while the electrospun membrane offered enhanced chemical resistance and durability. Despite promising results, challenges remain including mechanical abrasion resistance, environmental concerns over hydrophobic coatings, and scalability for industrial use. Future research should focus on eco-friendly, self-healing, and stimulus-responsive coatings to improve durability and environmental safety, advancing the practical application of superhydrophobic materials in wastewater treatment and oil spill remediation.
Co-Authors Agus Taufiq Aksaronas, Zidan Ashri Andi Riyanto Anugrah Thoriq Ari Setiawan Ari Setiawan Brama Nalendra Brama Nalendra Cahyo, Ari Dwi Cahyo, Muhammad Fiqih Nur Diah Riski Gusti Dian, Saskia Eka Eka Cahya Muliawati Endi Adriansyah Endi Adriansyah Intan Lestari Istiqomah Rahmawati Komar Sutriah M. Syaiful M. Syaiful M. Syaiful Mahdanisa Aulia Martina Asti Rahayu Muhammad Dzaky Arifin Mutiara Dewi Rukmana Mutiara Dewi Rukmana Mutiara Dewi Rukmana, Mutiara Dewi Nurul Asni Qolbi, M. Khofidul Radinal Rasya Septinania Az Zahra Rifqi Sufra Rifqi Sufra Rifqi Sufra Saskia Eka Dian Saskia Eka Dian Sri Mulijani Suzana, Asih Syahfutra, Juanda Edo Tazkia Maulida Putri Thoriq, Anugrah Wari Dony Yuyun Lusini Zahwa Annaya Zidan Ashri Aksaronas